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fix audio pitch

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This commit is contained in:
ftk 2019-02-23 10:36:25 +00:00
parent 374811c440
commit 8ad608888e
1 changed files with 4 additions and 2 deletions
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6
src/raudio.c
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@ -712,11 +712,13 @@ void SetAudioBufferPitch(AudioBuffer *audioBuffer, float pitch)
return;
}
audioBuffer->pitch = pitch;
float pitchMul = pitch / audioBuffer->pitch;
// Pitching is just an adjustment of the sample rate. Note that this changes the duration of the sound - higher pitches
// will make the sound faster; lower pitches make it slower.
mal_uint32 newOutputSampleRate = (mal_uint32)((((float)audioBuffer->dsp.src.config.sampleRateOut / (float)audioBuffer->dsp.src.config.sampleRateIn) / pitch) * audioBuffer->dsp.src.config.sampleRateIn);
mal_uint32 newOutputSampleRate = (mal_uint32)((float)audioBuffer->dsp.src.config.sampleRateOut / pitchMul);
audioBuffer->pitch *= (float)audioBuffer->dsp.src.config.sampleRateOut / newOutputSampleRate;
mal_dsp_set_output_sample_rate(&audioBuffer->dsp, newOutputSampleRate);
}